How's the economy? A pollster wants to construct a 99% confidence interval for the proportion...
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How's the economy? A pollster wants to construct a 99% confidence interval for the proportion of adults who believe thateconomic conditions are getting better.Part: 0 / 2Part 1 of 2(a) A poll taken in July 2010 estimates this proportion to be 0.3. Using this estimate, what sample size is needed so that theconfidence interval will have a margin of error of 0.01?A sample of adults is needed to obtain a 99% confidence interval with a margin of errorof 0.01.
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